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Chocolate Peanut Butter Cup Galaxy Cake

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  • Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
  • In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
  • Add the eggs, milk, vegetable oil, and vanilla extract, and beat until well combined.
  • Stir in the sour cream for added moisture.
  • Gradually add the boiling water, mixing until smooth. The batter will be thin, which is perfect for a moist cake.
  • Divide the batter evenly between the two prepared pans.
  • Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Let the cakes cool completely.

2. Make the Peanut Butter Frosting:

  • In a large bowl, beat the softened butter and peanut butter until smooth and creamy.
  • Gradually add the powdered sugar, beating well after each addition.
  • Add the heavy cream, vanilla extract, and a pinch of salt, and continue to beat until fluffy. Add more cream if needed to reach your desired frosting consistency.

3. Make the Chocolate Ganache:

  • In a heatproof bowl, combine the chopped chocolate and heavy cream.
  • Heat in the microwave or over a double boiler until the chocolate is fully melted and smooth.
  • Stir in the butter (optional) for extra gloss.
  • Let the ganache cool slightly before using.

4. Create the Galaxy Effect:

  • Divide the peanut butter frosting into 3-4 bowls.
  • In each bowl, add a few drops of food coloring to create different shades: deep purple, blue, black, and a lighter shade of purple or blue. Stir each color until fully incorporated.
  • You’ll use these different shades to create the galaxy effect on the cake.

5. Assemble the Cake:

  • Once the cakes are cool, place the first layer on a serving plate.
  • Spread a generous layer of peanut butter frosting over the first cake.
  • Place the second cake layer on top.
  • Cover the entire cake with a smooth layer of peanut butter frosting.
  • Now, to create the galaxy look: Take a spatula or butter knife and place dollops of the different colored frostings randomly on the sides and top of the cake.
  • Use a bench scraper, offset spatula, or spoon to gently spread the frosting, blending the colors together to create a galaxy effect.

6. Add the Chocolate Ganache:

  • Drizzle the chocolate ganache over the top of the cake, letting it cascade down the sides for a beautiful, shiny finish.
  • If you like, sprinkle edible glitter or star-shaped sprinkles on top for a cosmic touch.

7. Decorate:

  • For an extra peanut butter cup punch, top the cake with crushed Peanut Butter Cups (or mini cups) around the edges or sprinkle them on top.

8. Serve:

  • Let the cake set for a bit to allow the ganache to firm up before slicing.
  • Serve each slice and watch the gorgeous galaxy effect and the creamy peanut butter filling come to life!

Why You’ll Love It:

This Chocolate Peanut Butter Cup Galaxy Cake is a feast for both the eyes and the taste buds. The combination of rich chocolate cake, creamy peanut butter frosting, and smooth ganache makes every bite irresistible. The galaxy effect adds a whimsical touch, making this cake a showstopper for birthdays, parties, or any special occasion. And of course, the crushed peanut butter cups on top make it even more indulgent!

It’s a chocolate and peanut butter lover’s dream cake that’s as beautiful as it is delicious. 🌌🍫🥜

Let me know if you try it—it’s out of this world!

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